From 1716 to 1722, Vladislavich resided in
Venice,
Italy, dividing his time between the advocacy of his own private interests and those of the Tsar. Vladislavich entertained the aristocracy of Venice as well as foreign visitors,
Ernest Louis, Landgrave of Hesse-Darmstadt (1667–1739),
Charles I, Landgrave of Hesse-Kassel (1654–1730), Count Girolamo of
Colloredo-Waldsee, Governor of the
Duchy of Milan (then under Austrian rule), Prince
Teodor Konstanty Lubomirski,
Anselm Franz, 2nd Prince of Thurn and Taxis, and Count Charachin. - La verità in cimento - title page of the libretto - Venice 1720
Antonio Vivaldi dedicated
La verità in cimento to Vladislavich in Venice in 1720. While in Italy, among other commissions, he supervised the education of Russian nobles (such as painter
Ivan Nikitich Nikitin) and prepared important, secret political treaties with Pope
Clement XI. It was he who acquired in
Venice an assortment of marble statues that still decorate the
Summer Garden in
St. Petersburg. Among many tasks, Sava Vladislavich had, politically, the most important task for Russia, and that is the establishment of a
concordat with the
Roman Curia. During his stay in Italy, he was in direct contact with the Pope, about which Vivaldi writes in his dedication. For Italians, as well as all Catholics, the Pope is a god on earth, and the Serbian count negotiated a concordat with him for six years. That part of Sava's activity is not well known enough. There are certain documents about the negotiations, and they are most likely in the
Vatican archives. The Russians have only occasional Vladislavich report on the progress of negotiations. ==Treaty of Kyakhta==